From: Tyler Riddle <t.riddle@shadowcat.co.uk>
Date: Sat, 10 Nov 2012 00:19:44 +0000 (-0800)
Subject: OBJECT_REMOTE_LOG_SELECTIONS can turn logging classes on and off
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=74937354bfe5e4b492967e22d96521ebcb5b9a15;p=scpubgit%2FObject-Remote.git

OBJECT_REMOTE_LOG_SELECTIONS can turn logging classes on and off
---

diff --git a/lib/Object/Remote/Logging.pm b/lib/Object/Remote/Logging.pm
index 49d43f5..c137b3e 100644
--- a/lib/Object/Remote/Logging.pm
+++ b/lib/Object/Remote/Logging.pm
@@ -78,6 +78,26 @@ sub before_import {
    }
 }
 
+sub _parse_selections {
+    my ($selections_string) = @_;
+    my %log_ok;
+    
+    #example string:
+    #"  * -Object::Remote::Logging    Foo::Bar::Baz   "
+    foreach(split(/\s+/, $selections_string)) {
+        next if $_ eq '';
+        if ($_ eq '*') {
+            $log_ok{$_} = 1;
+        } elsif (s/^-//) {
+            $log_ok{$_} = 0;
+        } else {
+            $log_ok{$_} = 1;
+        }
+    }
+    
+    return %log_ok;
+}
+
 #this is invoked on all nodes
 sub init_logging {
   my $level = $ENV{OBJECT_REMOTE_LOG_LEVEL};
@@ -85,16 +105,18 @@ sub init_logging {
   my $selections = $ENV{OBJECT_REMOTE_LOG_SELECTIONS};
   my %controller_should_log;
 
-  eval { 
+  #TODO how can a third party module perform an action when a new
+  #interpreter is built on a remote node with out requiring support
+  #for that third party module baked into object::remote?
+  eval {
     require Log::Any::Adapter;
-    require Object::Remote::Logging::LogAnyInjector;
     Log::Any::Adapter->set('+Object::Remote::Logging::LogAnyInjector');
   };
 
   return unless defined $level;
   $format = "[%l %r] %s" unless defined $format;
   $selections = __PACKAGE__ unless defined $selections;
-  %controller_should_log = map { $_ => 1 } split(' ', $selections);
+  %controller_should_log = _parse_selections($selections);
   
   my $logger = Object::Remote::Logging::Logger->new(
     min_level => lc($level), format => $format,
@@ -103,7 +125,11 @@ sub init_logging {
 
   router()->connect(sub { 
     my $controller = $_[1]->{controller};
-    return unless $controller_should_log{'*'} || $controller_should_log{$controller};
+    my $will_log = $controller_should_log{$controller};
+    
+    $will_log = $controller_should_log{'*'} unless defined $will_log;
+    
+    return unless $will_log;
     #skip things from remote hosts because they log to STDERR
     #when OBJECT_REMOTE_LOG_LEVEL is in effect
     return if $_[1]->{remote}->{connection_id};
@@ -138,6 +164,7 @@ Object::Remote::Logging - Logging subsystem for Object::Remote
   $ENV{OBJECT_REMOTE_LOG_LEVEL} = 'trace'; #or other level name
   $ENV{OBJECT_REMOTE_LOG_FORMAT} = '%l %t: %p::%m %s'; #and more
   $ENV{OBJECT_REMOTE_LOG_SELECTIONS} = 'Object::Remote::Logging Some::Other::Subclass';
+  $ENV{OBJECT_REMOTE_LOG_SELECTIONS} = '* -Object::Remote::Logging';
   $ENV{OBJECT_REMOTE_LOG_FORWARDING} = 0 || 1; #default 0
   
   log_info { 'Trace log event' };
@@ -180,8 +207,11 @@ automatically be enabled via OBJECT_REMOTE_LOG_LEVEL and formated with
 OBJECT_REMOTE_LOG_FORMAT but those additional log messages are not sent to STDERR. 
 By setting the  OBJECT_REMOTE_LOG_SELECTIONS environment variable to a list of
 class names seperated by spaces then logs generated by packages that use those classes
-will be sent to STDERR. This is also a configuration item that is forwarded to the
-remote interpreters so all logging is consistent.
+will be sent to STDERR. If the asterisk character (*) is used in the place of a class
+name then all class names will be selected by default instead of ignored. An individual
+class name can be turned off by prefixing the name with a hypen character (-). This is
+also a configuration item that is forwarded to the remote interpreters so all logging
+is consistent.
 
 Regardless of OBJECT_REMOTE_LOG_LEVEL the logging system is still active and loggers
 can access the stream of log messages to format and output them. Internally
diff --git a/lib/Object/Remote/Logging/LogAnyInjector.pm b/lib/Object/Remote/Logging/LogAnyInjector.pm
index a8cf177..77d75b7 100644
--- a/lib/Object/Remote/Logging/LogAnyInjector.pm
+++ b/lib/Object/Remote/Logging/LogAnyInjector.pm
@@ -23,7 +23,7 @@ sub AUTOLOAD {
   our %LEVEL_NAME_MAP;
   
   #just a proof of concept - support for the is_ methods can
-  #be done but requires more modifications to the router
+  #be done but requires modifications to the router
   return 1 if $log_level =~ m/^is_/;
   #skip DESTROY and friends
   return if $log_level =~ m/^[A-Z]+$/;